Despite the fact it was "Part 1" the feats he showed were pretty amazing Lee needed Sake to be able to even hang with him especially with CM1 enhanced speed, his healing capabilities were also very impressive, and his durability with CM2 is pretty astounding. He was also a master in Kenjutsu from Orochimaru who also trained Sasuke Uchiha who we all know is amoung the top 3 Kenjutsu specialists with possible superior kenjutsu users being Killer Bee, and probably Mifune, possibly Mangetsu as well